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Re: [gimplefe] Regarding command line option handling


On 4 May 2016 at 13:02, Richard Biener <richard.guenther@gmail.com> wrote:
> On Wed, May 4, 2016 at 8:41 AM, Prasad Ghangal <prasad.ghangal@gmail.com> wrote:
>> Hi !
>> Currently I am trying to introduce new command line option -fgimple,
>> for that I am adding this to c.opt
>>
>> diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
>> index 4f86876..88e55c6 100644
>> --- a/gcc/c-family/c.opt
>> +++ b/gcc/c-family/c.opt
>> @@ -66,6 +66,10 @@ C ObjC C++ ObjC++ Separate Alias(d)
>>  -dump=
>>  C ObjC C++ ObjC++ Joined Alias(d)
>>
>> +fgimple
>> +C Var(flag_gimple) Init(0)
>> +Enable parsing GIMPLE
>> +
>>  -imacros
>>  C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing
>> filename after %qs)
>>
>>
>> But I am getting error as - "gcc: error: unrecognized command line
>> option â-fgimple â; did you mean â-fgimple â?"
>>
>> I am unable to find where to handle it.
>
> Did you properly re-build gcc after that change?  It should work just fine.
>
> Richard.
>

Yes, I did stage 1 build on latest revision. Still it's giving this
strange error - "gcc: error: unrecognized command line option
â-fgimpleâ; did you mean â-fgimpleâ?"


>>
>>
>> Till now I am able to JUST parse __GIMPLE keyword
>>
>> diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
>> index cae2faf..1ccb4d6 100644
>> --- a/gcc/c-family/c-common.c
>> +++ b/gcc/c-family/c-common.c
>> @@ -468,6 +468,7 @@ const struct c_common_resword c_common_reswords[] =
>>    { "__extension__",    RID_EXTENSION,    0 },
>>    { "__func__",        RID_C99_FUNCTION_NAME, 0 },
>>    { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, D_CXXONLY },
>> +  { "__GIMPLE",        RID_GIMPLE,    0 },
>>    { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, D_CXXONLY },
>>    { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, D_CXXONLY },
>>    { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, D_CXXONLY },
>> @@ -12393,6 +12394,7 @@ keyword_is_function_specifier (enum rid keyword)
>>      case RID_NORETURN:
>>      case RID_VIRTUAL:
>>      case RID_EXPLICIT:
>> +    case RID_GIMPLE:
>>        return true;
>>      default:
>>        return false;
>> diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h
>> index 663e457..a91665f 100644
>> --- a/gcc/c-family/c-common.h
>> +++ b/gcc/c-family/c-common.h
>> @@ -64,10 +64,10 @@ enum rid
>>    /* Modifiers: */
>>    /* C, in empirical order of frequency.  */
>>    RID_STATIC = 0,
>> -  RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
>> -  RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
>> -  RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
>> -  RID_NORETURN, RID_ATOMIC,
>> +  RID_UNSIGNED, RID_LONG,     RID_CONST,   RID_EXTERN,
>> +  RID_GIMPLE,    RID_REGISTER, RID_TYPEDEF, RID_SHORT,
>> +  RID_INLINE,    RID_VOLATILE, RID_SIGNED,  RID_AUTO,
>> +  RID_RESTRICT, RID_NORETURN, RID_ATOMIC,
>>
>>    /* C extensions */
>>    RID_COMPLEX, RID_THREAD, RID_SAT,
>> diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
>> index f0c677b..e690ca3 100644
>> --- a/gcc/c/c-decl.c
>> +++ b/gcc/c/c-decl.c
>> @@ -10401,6 +10401,8 @@ declspecs_add_scspec (source_location loc,
>>      case RID_TYPEDEF:
>>        n = csc_typedef;
>>        break;
>> +    case RID_GIMPLE:
>> +      break;
>>      default:
>>        gcc_unreachable ();
>>      }
>> diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
>> index bdd669d..266b672 100644
>> --- a/gcc/c/c-parser.c
>> +++ b/gcc/c/c-parser.c
>> @@ -732,6 +732,7 @@ c_token_starts_declspecs (c_token *token)
>>      case RID_ALIGNAS:
>>      case RID_ATOMIC:
>>      case RID_AUTO_TYPE:
>> +    case RID_GIMPLE:
>>        return true;
>>      default:
>>        if (token->keyword >= RID_FIRST_INT_N
>> @@ -2461,6 +2462,7 @@ c_parser_declspecs (c_parser *parser, struct
>> c_declspecs *specs,
>>      case RID_NORETURN:
>>      case RID_AUTO:
>>      case RID_THREAD:
>> +    case RID_GIMPLE:
>>        if (!scspec_ok)
>>          goto out;
>>        attrs_ok = true;
>> @@ -3960,6 +3962,7 @@ c_parser_attribute_any_word (c_parser *parser)
>>      case RID_INT_N_1:
>>      case RID_INT_N_2:
>>      case RID_INT_N_3:
>> +    case RID_GIMPLE:
>>        ok = true;
>>        break;
>>      default:
>>
>>
>>
>> After recognizing __GIMPLE, I am planning to call gimple_fn_parser
>> function which will parse gimple body.
>> For pass manager, basic idea is to introduce new member to struct
>> function as pass_list and modify function execute_pass_list to run
>> only passes in pass list.
>>
>>
>>
>> Thanks,
>> Prasad Ghangal


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